While most of us were gearing up for Art Basel, a smaller fair on the periphery of the European Union dealt with its own issues of being off-center, if not off the map. At the second edition of the revamped Art Athina, May 22-25, 2008, at Athens’ Helexpo convention center in the city’s Maroussi district, a lot of talk centered on the ideas of what’s in the middle and what’s on the edge of an increasingly fragmented (or, looking at it from another angle, all-encompassing) global art world.